Column-clamping mechanism



Feb. '19, 1924.; 7 11,484,450) 4 D. C. KLAUSMEYER COLUMN CLAMPING MECHANISM Filed Sept. 6. 1921 2- Sheets-Sheet 1 WITNESSES: INVENTOR v C 02% I BY ATTORNEY Feb. 19 1924?;

HAMASU D. C. KLAUSMEYER COLUMN GLAMPING MECHANISM Filed Sept. 6. 1921 2 Sheets-Sheet 2 ATTORNEY WC MW L DAVID C. KLAUSMEYER, OF CINCINNATI, OHIO, ASSIGNOR TO THE CINCINNATI BECK- FORD TOOL COMPANY, OF CINCINNATI, OHIO, A CDR-FQBATION OF OHIO.

COLUMN-CLAMPING. MECHANISM.

Application filed September 6, 1921. Serial No. 498,684.

To all whom it may concern:

Be it known that I, DAVI C. KLAUs- MEYER, a citizen of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Column-Clamping Mechanism, of which the following specification is a full disclosure.

This invention relates to clamping mecha nisms for radial-drills and it is primarily concerned with the proposition of rendering conveniently accessible to the user the means for manually operating the clamp which looks the radial arm against swinging in a horizontal plane.

In radial-drills, it is customary to mount the drill-head on an arm that horizontally projects from an upright post or column; the mounting of the arm being of such a nature that it may be raised and lowered and may also be swung laterally with respect to its vertical axis. For this purpose, an upright sleeve is pivoted about the post and one end of the arm circumscribes the sleeve and is adapted to slide vertically thereon but not to rotate relative to the sleeve. The vertical slide of the arm is restricted by means of clamping-levers mountedon its circumscribing end, and heretofore the lateral swing of the arm has been restricted by means of a clamp located at the base of the sleeve and adapted to'be oper ated to clamp the sleeve against rotationabout the post. It is quite inconvenient for the user to leave the work and to go to the base of the sleeve for the purpose of operating the sleeve-clamp and this invention proposes to rectify this condition by arranging the sleeve clamp-lever in the immediate vicinity of the clamp-levers employed for restricting-the vertical slide of the arm. It, furthermore, proposes for the clamp-lever and for its connection with the sleeve clamp, a mounting so designed that the clamp-lever will remain in a constant position relative to the clamp-levers for the arm, so that the user will always find the clamplevers clustered together in the same relation irrespective of either the vertical or the lateral shift in the position of the arm.

Other objects and advantages will be in part indicated in the following description and in art rendered apparent therefrom in connectlon with the annexed drawings. 7

To enable others skilled in the art so fully to apprehend the underlying features hereof that they may embody the same in the various ways contemplated by this invention, drawings depicting a preferred typical construction have been annexed as a part of this disclosure and, in such drawings, like characters of reference denote corresponding parts throughout all the views, of which Fig. l is a side elevation of a radial-drill embodying this invention. Fig. 2 is a fragmentary rear elevation of the same showing 111 section the clamp surfaces between the sleeve and the post. Fig. 3 is a section through line 3-3 of Fig. 2 showing the concentric relation between the sleeve-like end of the arm, the upright sleeve and the post and showing also in plan the clamping-levers for the arm and the sleeve respectively. Fig. t is a detail of the end of the sleeve clamp-lever. Fig. 5 is a front view of the part shown by Fig. 4. Fig. 6 is a fragmentary section of the turn-shaft for the sleeve-clamp showing an end view of the collar splined to the shaft and to which the clamp-lever is pinned. Fig. 7 is a side elevation of the parts shown in Fig. 6. Fig. 8 is a fragmentary detail of the clamp for the sleeve.

Referring to the drawings, A indicates the base of the machine on which is bolted the lower end A of the post A which extends upwardly and rotatably supports the sleeve B in a conventional manner. The lower end of this sleeve is enlarged belllilre, as indicated by B, so as to provide a portion circumscribing the braking surface A presented by the lower portion of the post. The bell B of the sleeve has a circumferential cut 1 and a transverse cut 2; thereby providing short flexible wings a and a which may be constricted by means of a draw-bolt 5 adapted to squeeze together the lugs a and c integrally formed on said wings. This draw-bolt 5 terminates at one end in an eye 7 circumscribing an eccentric 4. formed on a shaft3 journaled at its ends in the lug a. lFhe other end of the bolt 5 carries lock-nuts 6 for adjusting its initial tension and, as will be seen, a rotation of the shaft 3 will efiect a clamping of the sleeve on the braking surface A Unlike the conventional arrangement, the aforesaid clamp is not operated by a lever mounted on the base of the sleeve or located adjacent its lower end, but is, in accordance Silo with this invention, operated by a lever that is mounted on the circumscribingportion of the arm and which is carried thereby so as to be always located in proximity with the clamp-levers which restrict the vertical shift of the arm. Thus, it indicates a lever ournaled in a bearing 10 projecting from the sleeve-like portion M of the arm M. This lever is in splined relation with a shaft 0' which is used as an extension of the shaft 3;'itbeing afiixed to the latter by any suitable coupling C. The splined relation between the lever B and the shaft C may advantageously be established through asmall sleeve such as that indicated by P in 7. This construction provides an extensible connection whereby the lever B is operatively connected to the siee i-z-clamp in all of the positions of the arm M on the sleeve B. This small sleeve provides a bearing surface 11 which is journaled in the bearing l0 and is restrained from end-wise movement by its shoulder 12. The lever It has an anular portion 9 apertured to fit snugly on the upper end of the sleeve P and locked against end-wise movement by means of a pinl'? (see Fig. 1) passing through the aperture '16 in the lever and intertitting with the notch 15 in the upper end of the sleeve P. To secure the lever B against rotating relativetothe sleeve P, it is provided with a key it interfitting'with the key'-way l3 in the sleeve. The shaft (1 has a splined groove throughout its length and the sleeve 1? has its bore provided with a spline 11 se cured thereto and riding in the groove in the shaft C. By thismeans, the user is enabled to operate the clamp by grasping the end of the lever B which is sufliciently long to be quite accessible to him. In order, however, to prevent the lever R from swinging too far when operating the sleeve clamp, it is preferably provided with the project ing lug 18 which, as shown by Fig. 3,will impact the adjacent portion of the" arm and restrict any undue movement of the lever lt.

Inasmuch as the shaft G is journaled at its upper and lower ends, respectively,-in lugs 3 and 9, it will be seen that such shaft is carried bodily around with the sleeve 17 when the arm is being adjusted laterally. The lug 9 is an integral part of the head B which in turn is in unitary relation with the sleeve 13. This head alsoprovides a journaled 19 for a lifting-screw H which is likewise journaled in a bearing 20 provided by the lower end B of the sleeve. This lifting-screw is operated through gears G which are driven from a shaft L that vertically extends through the post A and derives motion from a shaft K ext-ending trans versely through the lower end A of said post. These gears are thrown in and out by conventional mechanism which includes a-shaft N (journaled at itsupper and lower menace ends in bosses 21 and 22) operated by a suitable hand-lever. The arm M isclamped by means of levers n and n adapted to constrict the clamp lugs m and m; these leverportions 8 being adapted to interlockw'itlrthe shaft Nto hold it in its non-liftingposition whenever the levers n and n are function- 7 ing to clamp the arm, and conversely.

It will be seen that, by this arrangement, the various clamping-levers are at all times immediately accessible 'tothe-user ofthe machine who is not obliged to shift'hisposition for th epurposeof locking the arm against either lateral or vertical movement, or both. Also, thatthe"sleeve-clamping lever, by reason of the lug 18, may be operated with safety when-the user is'standing 011 a box or a step-ladder for the purpose of adjusting the machine for'drillingiarge castings. The levers, being arranged to remainin clustered relation, willflbe immediately accessible to the user evenwhen limited in his position by his temporary support and, even though thenuts 6 had not been adjusted to take up undue slack inthesleeveclamp (as it shouldbe from-time to time) the lever It could not swing farther than the user expected and thereby cause 'him to lose his balance and perhaps-become injured by fallin V Havingthus revealed this invention, I claim as new'anddesire to secure the following combinations and elements, or equivalents thereof, by Letters Patent "of the United States 1. A radial-drill combining -a post; a sleeve pivoted thereto; an armyertically'adjustable on said sleeveya clamp for lockingsaidsleeve to saidpost; aclampffor locking said arm" to said sleeve {hand-levers for actuating said-erm-'clamp an upright shaft operatively connected with said sleeve clamp a bearing bracket secured upon said arm a bearing sl'eevejou'rnaled insai-d bearing' bracket'and having a spline connection with said shaft; and a handlever fixed to said bearing sleeve and having its free e'nd adjacent said arm clamping levers-for manually actuating said sleeve clamp.

2. In a radial-drill in combination a-"post; a sleeve pivoted thereto; an arm vertically adjustable on said sleeve;'a clampfor -loeking said sleeve to said post; manuallyactir able means for actuating said clamp,-said means comprising" a shaftjourna'led in said sleeve and having one end operatively connected to said clamp; a bearing-sleeve splined'to said shaft, said bearing-sleeve being formed with an externalcylindri'cal bearing surface and an enlarged head affordmg a stop-shoulder; a bearing-bracket secured upon said vertically adjustable arm.

within which said bearing -sle'eve-is journaled, sald bearing-sleeve beinggr'eater in length than the thickness of said bracket and adapted to project therethrough when In witness whereof, I hereunto subscribe V the stop-shoulder is in contact with said my name, as attested by the two subscribing 1 bracket; a hand-lever secured upon the prowitnesses. jecting portion of said bearing-sleeve and 5 affording means for rotating said sleeve and DAVID KLAUSMEYER' shaft to actuate said sleeve-clamp; and a stop Witnesses: for limiting the movement of said hand- 0. C. Snare,

lever. META NORDMAN. 

